Reply to Denise Nunez's post: I think it is unfair to categorize all the students fresh out of high school as not taking school seriously. I'm glad you wrote at the end end "that's not always the case." They do take it seriously, it is that culturally for that age group, apathy is cool, so they have a hard time expressing excitement in a classroom setting.
I like what you said about mixing the age groups, the older studnts benefit from the enthusiasm and technology skills of the younger ones, and the younger ones benefit from the maturity and perspective of the older ones.
